In December, Duff revealed that the reconciliation was actually their third attempt at making things work. She assured the co-hosts of "The Talk" that it was "going so great," and added, "Timing is such a big deal … third time's a charm!"

While you probably know Duff for starring on Disney's "Lizzie McGuire" and her teen pop career, you aren't alone if you've never heard of Koma.

Here's what you need to know about Matthew Koma.

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1. He's been playing music basically his whole life.

Koma performing at Coachella in April 2015.
Mark Davis/Getty Images

Born Matthew Bair, the electro-pop singer-songwriter and record producer, grew up on Long Island and landed a publishing deal when he was just 16. In 2011, he signed with Interscope Records and released two EPs.

6. He struggled with an eating disorder.

Koma opened up about his song "Dear Ana," revealing he's had issues with "restrictive eating."

"I battled for a bunch of years with an eating disorder that almost killed me," he told Fuse TV in 2017. "Because it's not something you hear a lot guys talk about, I never really said it out loud or admitted it to myself. It was to the point where you're sitting in a hospital, your heart isn't working, they're going to put a pacemaker in you and you don't really have a choice but to take it a bit more seriously and realize there's a problem here."